[vsnet-grb-info 24450] GRB 191221B: AGILE/MCAL observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26549
SUBJECT: GRB 191221B: AGILE/MCAL observations
DATE:    19/12/22 09:23:58 GMT
FROM:    Francesco Longo at U of Trieste,INFN Trieste  <franzlongo1969 at gmail.com>

F. Longo (UniTS and INFN Trieste),  M. Pilia (INAF/OA-Cagliari),
F. Verrecchia (SSDC, and INAF/OAR) , A. Ursi (INAF/IAPS),
M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata),
A. Argan, M. Cardillo, C. Casentini, Y. Evangelista, G. Piano
(INAF/IAPS), F. Lucarelli, C. Pittori (SSDC, and INAF/OAR),
A. Bulgarelli, V. Fioretti, F. Fuschino, N. Parmiggiani (INAF/OAS-Bologna),
M. Marisaldi (INAF/OAS-Bologna, and Bergen University),
A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi),
report on behalf of the AGILE Team:

The AGILE Mini-CALorimeter (MCAL) detected the long GRB191221B at
T0 = 2019-12-21 20:39:11.42 (+/- 0.01 s) already detected by Swift
(Laha et al., 2019; GCN #26534).

In the MCAL energy range (0.4-100 MeV), the burst lasted about ~15 s
and released a total number of ~12000 counts over a background rate of 650 Hz.

The light curve shows several peaks and can be found at
http://www.agilescienceapp.it/notices/GRB_065726_504045551.415264.png.

The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive
in the energy range 0.4-100 MeV. Additional analysis of AGILE data is
in progress.